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class="ndfHFb-c4YZDc-cYSp0e-Oz6c3e ndfHFb-c4YZDc-neVct-RCfa3e ndfHFb-c4YZDc-cYSp0e-DARUcf-gSKZZ" role="document" tabindex="0" style="margin-top: 12px; margin-bottom: 12px; width: 0px; left: 0px;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"><h2 class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-tJHJj" tabindex="0">Page 1 of 12</h2><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 12.5817%; top: 9.34343%; width: 74.8366%; height: 2.27273%;">The relationship between the height of water level in a glass
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 25.3268%; top: 12.8788%; width: 49.183%; height: 2.27273%;">and the frequency of the emitted sound
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 25.3788%; width: 43.3007%; height: 1.89394%;">Introduction, aim and background information
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 29.0404%; width: 73.8562%; height: 1.76768%;">On my last trip to Budapest, Hungary, I watched a street musician play an instrument
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 32.5758%; width: 75%; height: 1.89394%;">called the glass xylophone. A glass xylophone is a musical instrument made of upright
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 36.2374%; width: 73.8562%; height: 1.76768%;">glasses that are filled with water to different heights. There are many ways to make a
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 39.7727%; width: 75.817%; height: 1.89394%;">glass xylophone, simpler instruments consist of just a few glasses, while more complex
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 43.4343%; width: 74.8366%; height: 1.76768%;">ones are carefully designed and can include over fifteen glasses. Observing the street
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 46.9697%; width: 71.732%; height: 1.89394%;">musician play the glass xylophone made me curious about the Physics behind this
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 50.6313%; width: 68.1373%; height: 1.76768%;">instrument, so for my internal assessment I decided to investigate how a glass
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 54.1667%; width: 71.8954%; height: 1.89394%;">xylophone works, more specifically, why different glasses produce different pitches
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 57.8283%; width: 76.634%; height: 1.76768%;">depending on the height of the water in the glass. Pitch in music simply means how high
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 61.3636%; width: 75.817%; height: 1.89394%;">or low a sound is ("Pitch"). When studying waves, I remember learning that higher pitch
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 65.0253%; width: 73.6928%; height: 1.76768%;">means that the sound wave has a higher frequency, while a lower pitch means lower
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 68.5606%; width: 73.8562%; height: 1.89394%;">frequency. Based on what I know so far, I decided on the following research question
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 72.2222%; width: 17.6471%; height: 1.76768%;">for my investigation:
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 75.7576%; width: 71.4052%; height: 1.89394%;">How does the height of the water level in a glass affect the frequency of the sound
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 79.4192%; width: 58.1699%; height: 1.76768%;">emitted by the glass when the side of the glass is hit with a spoon?
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 82.9545%; width: 75.817%; height: 1.89394%;">When I started researching glass xylophones, I found many more articles about singing
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 86.6162%; width: 75.817%; height: 1.76768%;">glasses, also called glass harps. In contrast to a glass xylophone, when playing a glass
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 87.0915%; top: 93.4344%; width: 0.980392%; height: 1.51515%;">1
</p></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-cYSp0e-oYxtQd-gvZm2b"></div><img src="blob:https://drive.google.com/f8bb84a3-cf21-477e-b2bf-ba6e9c35c095" class="ndfHFb-c4YZDc-cYSp0e-DARUcf-RJLb9c" alt="Page 1 of 12" aria-hidden="true" style="opacity: 1;"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"><h2 class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-tJHJj" tabindex="0">Page 2 of 12</h2><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 9.21717%; width: 69.6078%; height: 1.76768%;">harp one has to rub the glass rim with a finger to produce sound (Nose 4). I also
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 12.7525%; width: 76.4706%; height: 1.89394%;">discovered that it does not matter whether we rub our wet fingers on the rim of the glass
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 16.4141%; width: 75.3268%; height: 1.76768%;">or hit the side of the glass with a metal spoon, because both methods create vibrations
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 19.9495%; width: 74.5098%; height: 1.89394%;">in the glass and produce the same frequency, so in my work I will also refer to articles
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 23.6111%; width: 74.5098%; height: 1.76768%;">about singing glasses ("Singing Glasses"). When energy is transferred to the glass by
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 27.2727%; width: 75.1634%; height: 1.76768%;">rubbing its rim or by hitting its side with a spoon, the glass starts to vibrate. In turn, this
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 30.8081%; width: 75%; height: 1.76768%;">causes the air molecules to vibrate with the same frequency, producing the sound that
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 34.3434%; width: 76.634%; height: 1.89394%;">we hear (Nose 10). As we add more water, it becomes more difficult for the glass wall to
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 38.0051%; width: 75.817%; height: 1.76768%;">vibrate due to the added mass and as a result, vibrates at lower frequencies, producing
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 41.5404%; width: 75.817%; height: 1.89394%;">a lower pitch (Lee 1). Moreover, I also found that the relationship between the height of
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 45.202%; width: 76.1438%; height: 1.76768%;">the water level and the frequency of the sound is not linear (Lee 3, Nose 11). Hence my
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 48.7374%; width: 74.8366%; height: 1.89394%;">hypothesis is that as the water level in the glass increases, the frequency of the sound
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 52.399%; width: 68.9543%; height: 1.76768%;">produced by the vibrating glass will decrease at an increasing rate, producing a
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 56.0606%; width: 14.2157%; height: 1.38889%;">nonlinear curve.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 11.6013%; top: 59.596%; width: 8.49673%; height: 1.76768%;">Planning
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 13.5621%; top: 63.2576%; width: 12.4183%; height: 1.38889%;">I. Variables
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 20.5882%; top: 66.7929%; width: 58.4967%; height: 1.76768%;">1. Independent variable: Height of the water level in the glass (cm)
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 20.4248%; top: 70.3283%; width: 58.3333%; height: 1.89394%;">2. Dependent variable: Frequency of the emitted sound wave (Hz)
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 20.4248%; top: 73.9899%; width: 17.9739%; height: 1.51515%;">3. Control variables
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 25.3268%; top: 77.5253%; width: 14.0523%; height: 1.51515%;">i. Glass used
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 81.1869%; width: 49.8366%; height: 1.76768%;">● Reason: glass shape and size influence the vibrations
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 84.7222%; width: 48.0392%; height: 1.89394%;">produced by the glass wall, hence affect the frequency.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 86.9281%; top: 93.4344%; width: 1.47059%; height: 1.51515%;">2
</p></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-cYSp0e-oYxtQd-gvZm2b"></div><img src="blob:https://drive.google.com/e7c8d430-0226-4a61-a25a-fa2f4619a907" class="ndfHFb-c4YZDc-cYSp0e-DARUcf-RJLb9c" alt="Page 2 of 12" aria-hidden="true"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"><h2 class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-tJHJj" tabindex="0">Page 3 of 12</h2><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 9.21717%; width: 55.8824%; height: 1.76768%;">● Method: I will use the same glass throughout the experiment.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 25%; top: 12.7525%; width: 27.6144%; height: 1.51515%;">ii. Glass cross-sectional area
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 16.4141%; width: 48.366%; height: 1.76768%;">● Reason: the volume of the water might influence the
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 19.9495%; width: 48.5294%; height: 1.89394%;">frequency. If the glass has varying cross-sectional area,
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 23.6111%; width: 52.2876%; height: 1.76768%;">every time we add water, the volume of the water added will
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 27.1465%; width: 10.6209%; height: 1.51515%;">be different.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 30.8081%; width: 54.7386%; height: 1.76768%;">● Method: I will use a glass that has the same cross-sectional
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 34.4697%; width: 23.8562%; height: 1.76768%;">area along its entire height.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 24.5098%; top: 38.0051%; width: 27.6144%; height: 1.76768%;">iii. Liquid used in the glasses
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 41.5404%; width: 51.634%; height: 1.89394%;">● Reason: different liquids have different densities. Larger
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 45.202%; width: 52.2876%; height: 1.76768%;">density makes it more difficult for the glass to vibrate, hence
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 48.7374%; width: 15.6863%; height: 1.89394%;">affects frequency.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 52.399%; width: 47.3856%; height: 1.76768%;">● Method: I will use water throughout the experiment.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 24.3464%; top: 56.0606%; width: 18.7909%; height: 1.76768%;">iv. Air temperature
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 59.596%; width: 55.0654%; height: 1.76768%;">● Reason: the speed of sound depends on the temperature of
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 63.1313%; width: 51.4706%; height: 1.89394%;">the medium it travels in. Since frequency is related to wave
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 66.7929%; width: 48.2026%; height: 1.76768%;">speed, temperature should be the same throughout the
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 70.4545%; width: 10.1307%; height: 1.76768%;">experiment
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 32.3529%; top: 73.9899%; width: 49.6732%; height: 1.76768%;">● Method: I will carry out the experiment indoors so that
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 35.1307%; top: 77.6515%; width: 29.902%; height: 1.76768%;">temperature can be kept constant.
</p><p class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-eEGnhe" style="left: 86.9281%; top: 93.4344%; width: 1.47059%; height: 1.51515%;">3
</p></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-cYSp0e-oYxtQd-gvZm2b"></div><img src="blob:https://drive.google.com/2b288989-9f45-45dd-aef7-8cfd3a77f840" class="ndfHFb-c4YZDc-cYSp0e-DARUcf-RJLb9c" alt="Page 3 of 12" aria-hidden="true" style="opacity: 1;"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-cYSp0e-oYxtQd-gvZm2b"></div></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-cYSp0e-oYxtQd-gvZm2b"></div></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-cYSp0e-oYxtQd-gvZm2b"></div></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf" style="padding-bottom: 129.438%;"><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-PLDbbf"></div><div class="ndfHFb-c4YZDc-cYSp0e-DARUcf-Df1ZY-bN97Pc-haAclf"></div><div class="ndfHFb-c4YZDc-cYSp0e-wxLEad-sn54Q" style="display: none;"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-gvZm2b"></div><div class="ndfHFb-c4YZDc-vWsuo-fmcmS-IDNFyf ndfHFb-c4YZDc-vWsuo-fmcmS-G0jgYd"></div><div 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